Tapped turbine.



W. KIESER.

TAPPED TURBINE.

APPLICATION FILED 0CT.22' I914.

Patented Sept. 14, 1915.

1111 II ilHllHlllll 4 J 2 8 1 Witnesses: Inventor- Walter Kieser:

Tl'TT TATE PAT T l lfi 91*11 WALTER KIESER, OF CHARLOTTENBURG, GERMANY,ASSIGNOR T0 GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

To (177 112 mm 6 Inag concern:

Be it known that I. VALTER Kirstin, a

citizen of the Republic of Switzerland, residing at Charlottenburg,Germany. have invented certain new and useful Improvements in TappedTurbines, of which the following is a specification.

This invention relates to steam turbines which are tapped at a point ofintermediate pressure to supply steam to industrial con sumptiondevices, such as cooking or heating systems.

Theobject of the invention is to keep the steam pressure constant in theconsumption system irrespective of variation in the demand of saidsystem or in the load on the turbine.

The invention consists in a certain combination of controlling 'alvesand regulators arranged and operating in a certain man ner, ashereinafter set forth and particularly pointed out in he claims.

The accompanying drawing illustrates diagrammatically one embodiment ofmy invention.

The turbine shown is a horizontal one, having a shaft 1 carrying one ormore high pressure'bucketwheels 2 and low pressure bucket wheels Highpressure steam is supplied through a main 4: to nozzles 5 directing thefluid upon the buckets of the wheel :2, from which it exhausts at alower pressure into the chamber 6. A pipe 7 leads from this chamber tothe industrial consumption system. Any excess of low pressure steampasses from the chamber 6 to a chamber Sfrom which it is supplied to thelow pressure wheels 3. A valve 9 controls the admission of high pressuresteam to the wheel '2, and an overflow valve 10 controls the admissionof low pressure steam from the chamber 6 to the chamber 8. A bypass 11controlled by a valve 12 conducts high pressure steam from the main 1direct to the chamber 6. A pressure regulator 13 also is connected withthe chamber 6. while a speed governor 14: is driven by the turbine.These two controlling devices are connected with the valves by a systemof levers preferably as follows: A short lever 15 pivoted at one end tothe speed governor is connected at its other end to' a floating lever16, one end of which is pivoted to the rod of the pressure regulator.Between this end and the point of attachment of the lever 15, the

Specification of Letters Patent.

stem of the supply valve 9 is attached. The other end of the floatinglever is pivotally connected to one end of an auxiliary floating lever17 whose opposite end is pivoted to the stem of the valve 1:2. Midway ofthe lever 1'? the stem of the overflow valve 10' is attached.

lator 13 moves the floating lever 16 wvhich fulcrums at the point a. andlifts the valve 9 to admit more high pressure steam. At

Patented Sept. ML, 1915; Application filed October 22, 1914. Serial No.8G8.089.

the *same time, the right hand end of the lever 17 is depressed,fulcruming at Z), and closes the overflow valve 10 to reduce the escapeof low pressure steam to the wheel 3. If this movement of the leverscontinues after the valve'lO closes. the lever 17 will fulcrum at candopen the bypass'valve'12 to admithigh pressure steam to the con sumptiondevices. The valves 9 and 10 thus move in opposite direct-ions when thepressure-regulator operates them. But if the speed of the turbinechanges owing to change in its load or in the demand for low pressuresteam by the consumption devices, the speed governor will oscillate thefloating lever 16 on the point (Z as a fulcrum, and the auxiliary lever17 on the point b,' thereby lifting or lowering both of the valves 9 and10 to regulate the flow of both high and low pressure steam to the.bucket wheels. If the load onthe turbine should decrease to quite anextent then the valve 10 will be closed by the speed governor. and theauxiliary lever 17. tilting on the fulcrum c, willopen the bypass valve12 'and admit enough high pressure steam to the chamber 6 to keep up theproper pressure in the consumption system. It thus appears that for allconditions of pressure and load, the pressure in the consumption systemwill be maintained at or near a given value.

While I have described the operation of the speed governor and thepressure responsive device independently,'it will. of course, beunderstood that in actual operation both will be acting at the sametime. each in a way modifying the action of theother on the respectivecontrolling valves.

In accordance with the provisions of the patent statutes, I havedescribed theprinciple of operation of my invention, together 'with theapparatus which I now consider.

to represent the best embodiment thereof; but I desire to have itunderstood that the apparatus shown is only illustrative and that theinvention can be carried out by other means.

What I claim as new and desire to secure by Letters Patent of the UnitedStates, is:

1. The combination with a turbine having aconsumption system connectedto a point of intermediate pressure, of ahigh pressure admissionvalve,an overflow valve between the high pressure and low pressure sides ofthe machine, a bypassvalve admitting high pressure steam directly to theconsaid system, means whereby the pressure regulator can actuate thehlgh pressure admlsslon valve and the overflow valve 111 ppositedirections, and will open the bypass valve only after the overflow valvehas been closed, a speed governor, and means whereby it can actuate theadmission and overflow valves in the same direction and open and closethe bypass valve.

3. The combination with a steam turbine having a high pressure bucketwheel 2', low pressure bucket wheels 3, and a chamber 6 of intermediatepressure, of a consun'iption pipe 7 connected with said chamber, an. admission valve 9, an overflow valve 10, a bypass alve 12 admitting highpressure steam 'to the chamber (5, a pressure regulator 13 connected tothe chamber. (3, a speed governor 14, a floating lever 16 connected tothe pressure regualtor, the speed governor and the valve 9, and anauxiliary floating lever 17, connected to the valves and 12 and to thelever 16.

In witness whereof, I have hereunto set my hand this 26th day ofSeptember, 1191i.

WALTER KIESER.

Witnesses:

Enxs'r KELLER, VVILLY NEUMANN.

